AD7861–SPECIFICATIONS

Parameter

AD7861AP

Units

Conditions/Comments

DC ACCURACY

Resolution

11

Bits

Twos Complement Data Format

Relative Accuracy

±2

LSB max

Integral Nonlinearity

Differential Nonlinearity

±2.5

LSB max

Bias Offset Error

±9

LSB max

Any Channel

Bias Offset Error Match

4

LSB max

Between Channels

Full-Scale Error

±13

LSB max

Any Channel

Full-Scale Error Match

4

LSB max

Between Channels

DYNAMIC PERFORMANCE

Signal-to-Noise Ratio (SNR)

60

dB min

Total Harmonic Distortion (THD)

–60

dB max

Peak Harmonic or Spurious Noise

–60

dB max

Channel-to-Channel Isolation

M1 = 0

–58

dB max

1 kHz Sine Wave Applied to Unselected Channels

M1 = 1

–53

dB max

1 kHz Sine Wave Applied to Unselected Channels

REFERENCE

Input Voltage Range (REF IN)

2.5

V

Input Current

50

µA max

Onboard Reference Output (REF OUT)

2.5

V

Reference Tolerance

±5%

Reference Drive Capability

±100

µA max

SAMPLE-AND-HOLD

Acquisition Time

1.6

µs

20 CLK Cycles @ 12.5 MHz

Aperture Delay Time

200

ns max

Aperture Delay Time Match

20

ns max

Droop Rate

5

mV/ms max

LOGIC

2

V min

0.8

V max

Input Leakage Current

1

µA max

Input Capacitance

20

pF typ

4.5

V min

0.4

V max

Three-State Leakage Current

1

µA max

CONVERSION RATE

Conversion Time/Channel

40

CLK Cycles

CONVST

Pulsewidth

2

CLK Cycles min

ANALOG INPUTS

Nominal Input Level

0–5

V

VIN1, VIN2, VIN3, AUX0–AUX3

Input Current

100

µA

Input Capacitance

10

pF

SYSTEM CLOCK

6.25–12.5

MHz

POWER REQUIREMENTS

5V dc

10

mA max

REV. B

– 2 –

otherwise noted)